Trapcard. Normal. Activate only when an opponent's monster declares an attack. Negate the attack and change it to Defense Position. It cannot change its battle position while it is face-up on the field. Then, your opponent selects and applies 1 of these effects: Gain Life Points equal to half the ATK of the monster whose attack was negated. Inflict damage to your opponent equal to half the ATK of the monster whose attack was negated.